Phase-locked sampling of a periodic signal

Details Phase-locked sampling of a periodic signal Phase-locked sampling of a periodic signal

G - Physics

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G01R 19/00 (2006.01) G01R 19/25 (2006.01) G01R 23/15 (2006.01) H03L 7/00 (2006.01)

Patent

CA 1233512

- 15 - ABSTRACT OF THE DISCLOSURE A method for phase-locked sampling measurement of a periodically varying quantity. The samples are desig- nated g(I) ... g(I-n) and may comprise one complete period or a half of one period. The method involves adapting the sampling frequency and the sample position in relation to the quantity to be measured such that phase locking is attained, and this is done by controlling the time interval between sampling. Whether the sampling frequency needs to be increased, left unchanged or be decreased, depends on a number of decisions depending on the values of samples g(I) and g(I) - g(I-n). A device for carrying out the method is also described.

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